Area Code — 720

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Rate centers: DENVER, LONGMONT, AURORA, DENVERSLVN, BRIGHTON, ALLNSPKLYN, KEENESBURG, HUDSON, FORTLUPTON, DEER TRAIL, GEORGETOWN, DECKERS

Companies: QWEST CORPORATION, NEW CINGULAR WIRELESS PCS, LLC, CELLCO PARTNERSHIP DBA VERIZON WIRELESS, SPRINT SPECTRUM L.P., AT&T LOCAL, LEVEL 3 COMMUNICATIONS, LLC, COMCAST PHONE OF COLORADO, LLC, BANDWIDTH.COM CLEC, LLC, XO COLORADO, LLC, T-MOBILE USA, INC., NEXTEL COMMUNICATIONS, INC., MCLEODUSA TELECOMMUNICATIONS SERVICES, INC., YMAX COMMUNICATIONS CORP., CBEYOND COMMUNICATIONS, LLC, TELEPORT COMMUNICATIONS GROUP, TW TELECOM OF COLORADO LLC, LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC., PAC - WEST TELECOMM, INC., ICG TELECOM GROUP, ESCHELON TELECOM OF COLORADO, INC., 360NETWORKS (USA) INC., GLOBAL CROSSING LOCAL SERVICES, INC., ZIPPYTECH INCORPORATED, MCIMETRO ACCESS TRANSMISSION SERVICES LLC, COMMNET WIRELESS, LLC, ALLEGIANCE TELECOM OF COLORADO, INC., INTERLINK ADV SVC D/B/A FORETHOUGHT.NET, PEERLESS NETWORK OF COLORADO, LLC, ONVOY, INC., ILOKA, INC. DBA MICROTECH-TEL, MOSAIC NETWORX, LLC, LIBERTY BELL TELECOM, LLC, AMERICAN MESSAGING (AM), INC., TELSTAR COMMUNICATIONS INC, TELIAX COLORADO, QWEST COMMUNICATIONS COMPANY, LLC, GREAT WEST SERVICES, LTD.

List of 720 Area-Code Phone Number Prefixes

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